Claude Code
Best for: Serious work on real repos
Anthropic's agent for your terminal, IDE and desktop. Reads the whole repo, runs commands and tests, and handles large multi-file changes well.
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Upgrade a framework or move to a new stack
“My app is stuck on an old version and the upgrade looks scary.”
Agents can read migration guides, plan the upgrade and do the mechanical edits. It goes far better when you have tests and a way for the agent to check itself.
Fix it yourself in 3 steps
- Make sure tests pass today; if you have few, ask the agent to add basic ones first.
- Have it read the official migration guide and write a step-by-step plan you approve.
- Do one step per branch, running tests each time, and compare behavior before and after.
Copy this prompt
Migrate this project from [old version/stack] to [new]. First read the official migration guide and give me a numbered plan with risks. After I approve, do one step at a time, running the tests after each, and stop if tests fail. Don't delete old code paths until I confirm the new one works.
Fill in the [brackets]. Each prompt says when the AI should stop, so it doesn't wander off.
Agents people used for this: Claude Code, Devin, Cursor, Gemini.
Inspired by real examples collected at agentusecases.ai.
📚 13 real stories of people doing this with AI agents
- Convert React MUI components to Tailwind with Devin · Devin
- Migrate 180 microservices to a new framework version · Cursor
- Migrate WordPress posts to MDX · Claude Code
- Migrate a SaaS from AWS to DigitalOcean · Claude Code
- Migrate a legacy product stack with Claude Code · Claude Code
- Migrate a password reset flow to modern libraries · Claude Code
- Migrate an Electron app from Vue 2 to Vue 3 · Devin
- Migrate toolchain, architecture and site design with Claude Code · Claude Code
- Orchestrate a multi-phase RAG migration · Gemini
- Port the Copilot runtime to Rust agentically · custom-built or unnamed agent
- Rewrite a runtime from TypeScript to Rust with agents · GitHub Copilot
- Update a legacy Telegram bot and refactor an app · Replit Agent
- Upgrade site dependencies and frameworks with Cursor · Cursor
Collected at AgentUseCases.ai.
Tools for this
Cursor
Best for: Editor-first developers
A VS Code-style editor built around AI, with background agents. The comfortable choice if you live in an editor.
Visit Cursor ↗Gemini
Best for: Google Workspace users
Google's assistant, woven into Gmail, Docs and Android. Strongest if you live in Google's apps.
Visit Gemini ↗